Definition 1: Requiring a lot of attention. When describing a person, high-maintenance usually means that the individual is emotionally needy or prone to over-dramatizing a situation to gain attention
definition 2:A person who has expensive taste (re. clothing, restaurants, etc.).
This person is never comfortable because he/she is constantly concerned about his/her appearance.
This person feels they are better than most people and usually judge others based on outward appearances.